25 lines
589 B
Markdown
25 lines
589 B
Markdown
---
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title: attempt
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tags: function,intermediate
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---
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Attempts to invoke a function with the provided arguments, returning either the result or the caught error object.
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Use a `try... catch` block to return either the result of the function or an appropriate error.
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```js
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const attempt = (fn, ...args) => {
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try {
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return fn(...args);
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} catch (e) {
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return e instanceof Error ? e : new Error(e);
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}
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};
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```
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```js
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var elements = attempt(function(selector) {
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return document.querySelectorAll(selector);
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}, '>_>');
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if (elements instanceof Error) elements = []; // elements = []
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``` |